Intangible Assets and Goodwill (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2019	Dec. 30, 2018
Intangible assets with indefinite lives:
Indefinite-Lived Intangible Assets			$ 11,262	$ 9,190
Total intangible assets - net			49,332	47,611
Trademarks
Intangible assets with indefinite lives:
Indefinite-Lived Intangible Assets			6,939	6,937
Purchased In-Process Research And Development
Intangible assets with indefinite lives:
Indefinite-Lived Intangible Assets			4,323	2,253
Patents And Trademarks
Intangible assets with definite lives:
Finite-Lived Intangible Assets, Gross			36,582	35,194
Less accumulated amortization			11,500	9,784
Finite-Lived Intangible Assets, Net			25,082	25,410
Customer relationships and other intangible assets
Intangible assets with definite lives:
Finite-Lived Intangible Assets, Gross			21,862	21,334
Less accumulated amortization			8,874	8,323
Finite-Lived Intangible Assets, Net			$ 12,988	$ 13,011
Alios Biopharma Inc | Purchased In-Process Research And Development
Intangible assets with indefinite lives:
Impairment charge	$ 900	$ 800